Soil-enganging blade for harrows and the like.



E. M. KRAMER.

SOIL- ENGAGING BLADE FOR HARROWS AND THE LIKE. APPLICATION FILED SEPT. 24, 1908. RENEWED JUNE 6, 1910 963,716. Patent-Led July 5, 1910.

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.SOIL-ENGAGING BLADE FOB HARROWS AND THE LIKE.

SpecificationofLettersPatent, t a Ju1y"5,19i,

Aiiplication and September at, 1908, Serial No. 454,496. Renewed Inns 6, 1910. Serial No. 565,381.

To all whom it my concern: i

Be it known that I, EMIL M. KRAMER, a citizen of the United States, residing at Paxton, in the county 'of Ford'and State of Illinois, have invented a new and useful SoiLEnga 'n Blade for Harrowsnnd the Like, of wiic the following is aspecification. This invention has relation to soil engaging blades for-barrows and similar implements and 1t eonsists 1n the novel construction and arrangement of its parts as herein- -after shown and described.

The object of the invention is to provide a blade of a special and peculiar configuration which is especially adapted to be effectually used for pulverizing and slightly spading the soil and at the same time cleaving the same below the surface whereby the top soil may be aerated.

With the above object in viewa blade is provided which in side elevation is substan- --tially scimitar shaped and which is provided at its forwardedge with a sharpened or cutting edge and at-its outer rear end portion with a sharpened or'cutting edge the said cutting edges coming together and terminatin at a point atthe outer extremity of the lade. The said blade is curved laterall and a heel is formed at the rear edge 0. the blade and at the inner end of the sand rear cutting edge which heel is adapted to accomplish the spading of the soil as will hereinafter appear.

In the accompanying drawings, Fi re 1 is a side elevation of several of the lades showing the manner in which they may be applied to a disk or hub. Fi 2 is a transverse sectional View of a portion of the hub cut on the line 2-2 of Fig. 1. Fig. 3 is a side elevation of the blade. Fig. 4 IS a rear edge elevation of the blade, and Fig. 5 is a front edge elevation of the blade.

The blade consists of the shank l whichis,

preferably rectangularly shaped and which 1s provided with a rivet perforation 2. The

said shank 1 merges into the blade proper 3 whicliis curved along its longitudinal axis and is also curved laterally. The blade proper 3 is provided with the sharpened" or cutting edged and which is designated as the front or forward cutting edge. The said blade 3 is also provided at the outer portion edge 5. The said edges 4 and 5 come together at the point metal of the disk between the channels 8 is V 6 which defines the outer extremity of the blade as an entirety. The inner rear end of the cutting edge 5 terminates' atthe heel or shoulder 7 Thus it will be seen that the general configuration of the blade as an entirety is in the form of a scimitar in side elevation or oblanceolate; that is, narrowing toward the point of attachment more than .toward the apex and that it is provided with edge which come together at the pointe outer extremity of the blade.

The blades may be applied to a disk of any desired pattern but preferably such a disk is formed Zas shown in Fig. 1 of the drawings'in which the disk is proyided with the coves or'channels 8 which are disa forward cutting edge and a rear cutting pose tangentially with relatiomto a circle struck from the center of the disk. The

cut away .as at 9 whereby a light and durable structure of the disk is elfected.

When in'use the disks-are placed upon a shaft (not shown) and usually the disks are pitched at an angle to the line of draft. Thus as the blades come in contact with the soil the edges i thereof cleave the soil and the pointed outer extremities 6 down into the soil. During the projectory movement the edge 5 also cleaves the soil so that the resistance of the blade entering the soil is reduced to a minimum. As the blades successively move up or out of the soil the sides of the clefts made by the extremities of; the blade are slightly spaded or turned disk in a manner much ,similar to that of the arrangement of spokes upon the bid) of 109 v a wheel, and, as-the disk rotates in the di-" rection indicated by the arrow in Fig. 1, the

blade which is directly under thecenter of v the disk, (theoretically) for an instant ass sumes a state of rest, while those blades 105 mounted at the forward portion of the disk are advancin Consequently, as each blade enters the soi it is mo in aforward direction, and its edge 5W1 cleave thifs'oil, and not plow as would be are projected 53%? by the heel portions 7 and thus the soil is itated the case if'a'bllint all" surface were provided at that portion bf the blade occupied'by the said edge 5. Whenthe blade 5-arrives at a position in vertical alinement with the center of the disk, and begins to move upward out of the soil, the heel portion 7 thereof operates upon the soil and spades the same in the manner as above indicated. Thus it will be seen that as each blade enters the soil it is, at all times, cleavone side of its long dimension a relatively long convex cutting edge and at the other side of said long dimension alrelatively short straight cutting edge, said cuttingedges conj the blade. I

vergingtoa point at the outer extremity of 2. A soil working blade of narrow ensionmr shabe having at the forward edge of its long dimension a convex cutting edge, a shorter rear edge, and a straight cutting edge joining the two said edges and returned sharply from the end of the forward edge and forming an acute point at the extremity of the blade.

3. A rotary harrow member having a series 'of soil-working blades, the outer extremity of each of said blades co-inciding only at asingle point with a circle whose center is the axis of the member, said blade having a forward convex cutting edge extending along its longer dimension, the curve of which edge intersects said circle, said blade having a. rear concave edge along its longer dimension and having a short end cuttln edge forming a secant of said circle an joining the ends of the other edges. I

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

- EMIL M. KRAMER.

Witnesses:

A. V. RozE'NE, J. W. IIAUFMANN. 

